Window clarifier



July 9, 1929. J. B. WALKER WINDOW CLARIFIER Filed March 15, 1928 2 Sheets-Sheet Inventor, II James Blaine, Walker, Byw7fiflw A ttorney Fig.3.

July 9, 1929. J WALKER 1.720.532

WINDOW CLARIFIER Filed March 15, 1928 2 Sheets-Sheet 2 I I I Y] I, I I I h I v pmmmwwmwmmw mmmww' Inventor,

James Blame Walker,

I At korney- Patented July 9, 1929.

PATENT OFFICE.

JAMES BLAINE WALKER, OF NEW YORK, N. Y.

WINDOW CLARIFIER.

Application filed March 15, 1928. Serial No. 261,808.

This application is a continuation in part of my application Serial No. 200,551, filed June 22, 1927.

This invention relates particularly to means for keeping clear the windows of cabs of engineers and motormen operating locomotives, cars and other vehicles, propelled by steam, electricity or other power, wherein the engineer sits or stands behind a window through which he must look to obtain a clear View head.

Objects of this invention are to provide an effective means which is inexpensive both in first cost and in operation for clearing such 16 windows and for keeping them clear, and for preventing the accumulation of frost or snow thereon, the means being such that the operation will take but little of the engineers time and will not distract him from his main duties or require that he leave his position within the cab. Further objects are to provide a construction which is easy to o erate, and the operation of which will not e obstructed by the adhesion of frost to the surface of the pane.

In the accompanying two sheets of drawings which form a part of this description,

Figure 1 is a vertical section through a panel or section of the front wall of a. car or engineers' cab taken on the line II of Fig. 3, which includes a window-frame with this invention embodied.

Fig. 2 is I a vertical section through the same on the line 11-11 of Fig. 3.

Fig. 3 is an elevation viewed from the inside of the car or cab.

Fig. 4 is a horizontal section to a larger scale on the line IV'IV of Figs. 5 and 6. Fig. 5 is a vertical section of a portion on the line V-V of Fig. 4.

Fig. 6 is a vertical section of a portion on the line VI-VI of Fig. 4..

The front Wall of the car or engineers cab has a window-frame with two pairs of guides 7,7 and a pocket 8. Window sashes 9, 9 with panes 10, 10 slide in the guides and either can be lowered into the pocket. A handle 11 on the top bar of the inner sash is provided for directly raising and lowering this sash. Chains 12, 12 lead over pulleys 13, 13 and connect the top bars of the two sashes so that on raising or lowering the inner sash by means of its handle the outer sash will be reversely lowered or raised, and either sash this purpose and to stiffen the wipers, rods 15, 15 are attached to these edges. The ends of these rods engage hinge holes in nuts 16, 16 which are carried on screws 17, 17 by which the wipers are set to a roper adjustment when they are horizontal or hearing against and wiping the panes. The wipers have crank-pins 18, 18 which are connected through links 19, 19 with a hand lever 20 by which either wiper can he moved out of engagement with its pane and the other wiper moved into engagement with its pane. The movement into and out of engagement is independent of the screws so that on return to its horizontal position the wiper will be restored to the same adjustment.

It is not necessary to wipe each pane both when it is being lowered into the ocket and when it is being withdrawn and y wiping during movement in only one direction, only one pane will be wiped as the positions of the panes are exchanged and the panes are more easily changed. Furthermore, there may be an adhesion of frost or snow to the ex osed therefore folded out of engagement during such movement. the pocket any such frost or snowwhich may be adhering will be loosened or converted to moisture and will be readily wiped off as the pane is brought out of the pocket into operative position.

Latches 21, 21 enga e ratchets in the edges of the sashes, and eac latch by engagement with. its sash keeps the sash from being lowered into the pocket. Pins 22, 22 project from the latches and are engaged by cams 23, 23 which are formed on the hand lever and operate when the lever is' in one position to retract one latch andpermit the lowering of the sash which it engages, this being also the position of the hand lever which folds But while the pane is inthe wiper for the pane of the sash down and out of engagement while the sash is released for lowering. Since the latches make a ratchet connection, neither latch interferes with the lifting of the sash which it engages.

An electrical heating element 25 is provided in the pocket and serves to heat whichever pane is in the pocket.

In operation, when the engineer or motorman finds that the pane through which he is looking is tending to become obscured by the lodgement of particles of dust, or is likely to become obscured by the accumulation of frost or snow, he raises or lowers the inner sash according as it is down or up and thereby exchanges the position of the sashes and brings out of the pocket the pane that he is to look through. By reason of its warmth, frost or snow will not commence to accumulate thereon until it has had time to cool off and before such time arrives the places of the panes are again exchanged.

Application of wipers as set forth 1s not limited to the outer side of the panes, but a hand wiper can be readily used to remove particles of dust or moisture on the inner sides of the panes which face the engineer or motorman.

I claim:

1. Awindow-frame provided with a pocket, a transparent pane slidable into and out of the pocket, a wiper for the pane supported by the frame at the mouth of the pocket and movable into and out of engagement with the pane, means for preventing the movement of the pane into the pocket, and means operating with the movement of the wiper out of engagement with the pane for withdrawing the means for preventing the movement of the pane into the pocket.

2. A window-frame provided with a pocket, a transparent pane slidable into and out of the pocket, a wiper for the pane supported by the frame at the mouth of the pocket and movable into and out of engagement with the pane, means for preventing the movement of the pane into the pocket, means for preventing the withdrawal of the pane out of the pocket, means operating with the movement of the wiper out of engagement with the pane for withdrawing the means for preventing the movement of the pane into the pocket, and means operating with the movement of the wiper into engagement with the pane for withdrawing the means for preventing the withdrawal of the pane from the pocket.

3. A window-frame provided with a pecket, a transparent pane slidable into and out of the pocket, a wiper for the pane supported by the frame at the mouth of the pocket and movable into and out of engagement with the pane, a latch for preventing the movement of the pane into the pocket, and means operating with the movement of the wiper out of engagement with the pane for withdrawing the latch.

4. A window-frame provided with a pecket, a transparent pane slidable into and out of the pocket, a wiper for the pane supported by the frame at the mouth of the pocket and movable into and out of engagement with the pane, a latch for preventing the withdrawal of the pane from the pocket, a latch for pre venting the movement of the pane into the pocket, means operating with the movement of the wiper into engagement with the pane for withdrawing the latch which prevents the withdrawal of the pane from the pocket, and means operating with the movement of the wiper out of engagement with the pane for withdrawing the latch which prevents movement of the pane into the pocket.

45. A window-frame provided with a pocket, a transparent pane slidable into and out of the pocket, a wiper for the pane supported by the frame at the mouth of the pocket, means for adjusting the wiper to the pane, and a hinge connection between the wiper and the adiusting means whereby the wiper can be folded into and out of engagement with the pane without altering the adjustment.

6. A window-frame provided with a pockct. two panes slidable-into and out of the pocket, pulley connections between the panes whereby when one pane is moved into the pocketthe other pane is withdrawn from the pocket. a wiper for each pane, a latch for preventing the movement of each pane into the pocket, means for moving either wiper into engagement with its pane, means for simultaneously moving the other wiper out of engagement with its pane, and means for simultaneously retracting the latch which prevents movement of the pane into the pocket from which the wiper has been moved out of engagement.

JAMES BLAINE WALKER. 

